denayrouze



(No Model.) 2 Sheets-41mm; 1. L. DENAYROUZE. AUTOMATIC SPEED REGULATOR FOR ELEGTROMOTORS.

No. 573,767. Patented Dec. 22, 1896.

AZ; .BY

WITNESSES! INVENTOR:

ATTOR/VEK 2 E Z U 0 D Y A N E D .l

AUTOMATIC SPEED REGULATOR FOR ELEGTROMOTORS. No. 573,767.

Patented Dec. 22, 1896.

iNvENToR:

,fiuh BY ATTORN Y.

WITNESSES! .PMOYILLIIHOHWASHINGTON n c designate corresponding parts throughout the UNITED STATES LOUIS DENAYROUZE,

PATENT OFFICE.

OF PARIS, FRANCE.

AUTOMATIC SPEED-REGULATOR FOR ELECTROMOTORS.

SPECIFICATION forming part of Letters Patent No. 573,767, dated December 22, 1896.

Application filed November 26, 1895. Serial No. 570,215. (No model.)

To all whom it may concern.

Be it known that I, Louis DENAYROUZE, engineer, a citizen of the Republic of France, residing in Paris, France, have invented an Improvement in Automatic Speed-Regulators for Electromotors, of which the following is a specification.

My invention has reference to an automatic governor for electric motors.

It consists, essentially, in combining Withthe motor a make-and-break contact adapted to maintain the circuitof the generator closed while the motor is running at its normal speed and to break said circuit when the speed eX- ceeds the normal. v

The nature of my invention will best be understood when described in connection with the accompanying drawings, in which Figure 1 represents a plan or top view of a motor provided with my improved governor, the frame being omitted. Fig. 2 is an end elevation. Fig. 3 is a side view. Fig. 4 isa section 011 the line 4 4, Fig. 1. Fig. 5 is a plan and Fig. 6 an end view of another form of governor embodying my invention.

Similar letters and numerals of reference several views of the drawings.

Referring to Figs. 1 to 4 of the drawings, the letter A designates the shaft of an electric motor. Bis the armature, mounted on an insulating-sleeve D. O is the commutator, and 1 2 are the commutator-brushes. Near one end of the shaft, and in metallic contact with the same, is secured a metallic disk E. On this disk bears a brush 3, connected bya wire 10 with the brush 1 of the commutator, which latter brush is not directly connected with the generator P. On the other side of the armature B the shaft carries a disk F, which is insulated from the former by the sleeve D and is connected with the generator P by a brush Z) and wirell. This disk carries an arm G, at the end of which latter is secured a roller g, preferably made of silver. On the shaft, and in the plane of the roller g, are secured bent weighted arms H I, made of a flexible conducting material. One of the weights I bears against the roller g when the motor is at its normal speed, but, owing to the action of centrifugal force, it leaves the same when this speed is exceeded. The parts last described therefore form a make-andbreak contact influenced by the speed of the motor.

When the shaft is revolving at its normal or predetermined speed, the current from the generator P passes from one pole of the generator, over wire 12, to brush 2, commutator G, armature B, brush 1, over wire 10 to brush 3, shaft A, weighted arms II I, roller g, disk F, brush Z), and over wire 11 to the other pole of the generator. Should the speed exceed the normal, the weight I leaves the roller 9 and the circuit of the generator is broken, as indicated at 7;, Fig. 4, until the motor returns to its normal speed.

In the present instance I have shown a fan K secured to the motor-shaft. For it may be substituted a pulley or other means for transmitting power from the shaft. In the modification shown in Figs. 5 and 6 the fan K (or pulley) has its hub M loosely mounted on the shaft A, and said hub carries a transverse arm 11. One terminal of a spiral springR is attached to the shaft A, while its other terminal is secured to one end of the arm H, said spring permitting relative motion between the fan and the shaft. The opposite end of the arm carries a roller 72 which at the normal speed of the motor is in contact with the arm G, projecting from the disk F described in connection with Figs. 1 to 4. If the speed of the motor becomes too high, the spring R is strained, the hub M,with the fan or pulley, lagging behind, and the contact G b is broken, and consequently the circuit of the generator P, until the speed of the motoris reduced.

\Vhat I claim as new is 1. A governor for electric motors, comprising a contact-disk mounted on the motor-shaft and connected with one brush of the commutator, a disk mounted on, and insulated from, the motor-shaft and provided with a contact, electric connection of said disk with the generator, and a contact having a flexible connection with the shaft and adapted to engage the former contact, substantially as described.

2. A governor for electric motors, comprising a contact-disk mounted on the motor-shaft and connected with one brush of the commutator, a disk mounted on, and insulated from, the motor-shaft and provided with a contactroller, flexible weighted contact-arms secured to the shaft, one of which is adapted to en,- gage with the former Contact, and electrical connections, substantially as described.

I A governor for electric motors, eemprisi leontaet, a spring connecting the shaft and sleeve, and electrical (-oinleetions, substantially as described.

In witness whereof I. have hereunto signed my name in the pi'esenee of two subscribing 1 witnesses.

LOUIS DENXY ROU Z16. \Vitnesses:

JULns Annnxmrn, .l'eune, CLYDE S'i-uzorsmnn. 

